Rotary steam-drier



(No Model.)

H. D. WINTON. ROTARY STEAM DRIER.

No. 443,201. Patented Deo. 23, 1890.

UNITED STATES PATENT Onrrcn.

HENRY D. \VINTON, OF 'WELLESLEY HILLS, MASSACHUSETTS.

ROTARY STEAM-DRIER.

1 SPECIFICATION forming part of Letters Patent No. 443,201, dated December 23, 1890.

Application filed December 12, 1889. Serial No. 338,412. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY D. WIN'roN, a citizen of the United States, residing'at Wellesley Hills, in the county of Norfolk and State of Massachusetts, have invented a new and useful Improvement in Rotary Steam- Driers, of which the following is a specification.

My invention relates to improvements in rotary steam drying apparatus, and appertains to that class of driers which have an external cylinder set slightly inclined and provided with internal steam-heating pipes.

The object of my invention is to obtain a greater amount of contact heating-surface upon the interior, and a more perfect means of retaining the material to be dried in contact with said heating-surface, and at the same time to provide opportunity for the material to be disturbed and showered through heated air, so that a more rapid and thorough drying is accomplished, and a material containing a great per cent. of moisture can be handled profitably and to advantage.

This apparatus is particularly adapted to the drying of refuse, garbage, or What is termed swill; also for wet and heavymalts or grain, or for the extraction of moisture from any soggy material. I accomplish these objects by means of the apparatus as described and set forth in the following specification, of which the accompanying drawings form part.

Referring to drawings, Figure 1 represents a perspective view of the apparatus with all its accessories. Fig. 2 represents a part sectional View of the steam-supply end, the same being duplicated for use as an exhaust end. Fig. 3 represents a section or portion of the internal heating-pipes with the buckets attached thereto. Fig. 4 represents one of the buckets and its method of application to the heating-pipe. Fig. 5 represents the method of attaching the coil of pipe to the external cylinder.

Referring to Fig. 1, 1 represents the external cylinder, which is made of sheet iron or steel riveted together in sections, and it may be of dimensions suited to the amount of material to be handled. 2 and 3 represent rings which are secured to the outside of the cylinder, and which form a guide or running surface for the rotation of the cylinder upon its trucks. 4. represents a gear secured to the outside of the cylinder insuch a manner that it can rotate said cylinder by means of a pinion which meshes into the gear on the under side of the cylinder, and which forms part of the shaft 12,so as to be controlled by the pul ley 13. 11 and 11 represent frames which carry the truck-wheels. These Wheels, as indicated in the drawings, are arranged so that there are two of them upon each frame, and they swing upon a pivot on the frame, that they may adjust themselves to the ring. 11 represents a wheel mounted upon the same frame that carries the adjustable wheels, but placed at right angles thereto, so that it comes against the side of the ring 2 and forms a bearing which prevents the cylinder from settling forward from its proper location upon the trucks. 11" and 11 represent frames of the same general construction as those just described, but which are set a little higher, so that they cause the cylinder to be slightly inclined. secured to the interior of the cylinder and which extends throughout its length to within a few feet of either end. This coil terminates at both ends, as indicated at 10, in a bend which brings the pipe at its extremity to a central point, whereby it can be attached to the supply and exhaust ends. 7 represents the framework, which is secured to the interior of the cylinder and which forms the support for the supply and exhaust ends. This framework and end, as shown in the front open end of the cylinder, is duplicated at the rear. 8 is the body, which forms part of the supply and exhaust end, and 9 the pipe which communicates through said body with the coil of pipes in the interior of the cylinder.

1 will here refer to Fig. 2 for a better understanding of the supply and exhaust ends. They are duplicated, one at the steam-inlet end of the drier and the other at the outlet end.

Referring to Fig. 2, 7 represents the frame,

5 represents a coil of pipe, which is which is secured to the interior of the cylinder, in the center of which is an annular space into which is secured a casting 19. 'Itisheld centrally within the frame by means of setscrews, as indicated at 22 and 23. Into the end of this casting 19 is secured a pipe 20, which forms the terminal or point of connec tion of the coil in the interior of the cylinder. To the other end of the casting 19 is bolted the body or main casting 8. Through the interior of the latter is a pipe 9, which is held from withdrawing therefrom by means of a collar and nut. packed by means of the stuffing-box shown at 18. The operation of this steam-supply end is as follows: Steam being admitted to the pipe 0, it passes through it to the hollow chamber formed in the casting 10, from thence into pipes 20 and 21, which directs it through the coil to a similarly-constructed end at the back of the cylinder, by which the exhauststeam is conducted away. The stufling-box 18 prevents the steam which leaks from the chamber in the casting 19 into the annular space in the casting 8 from escaping. It will be seen by this construction that when the device is secured within the cylinder, as indicated in Fig. 1, as the cylinder rotates upon its trucks the body or main casting 8 revolves around the pipe 9, which is held stationary, maintaining a perfect steam connection with the coil of pipes.

Referring now to Fig. 3, which represents a section of pipes which forms part of the coil secured to the interior of the cylinder, 6 6 0 represent buckets or wings secured to the pipe, and which are intended to pick up the material which is in process of drying and hold it in contact with the heated pipes-that is, as the cylinder revolves the material is picked up from the bottom of the cylinder and carried around with it in contact with the pipes to a point where it slides off the buckets and is showered through the heated air to the bottom of the cylinder, to be picked up and carried around again. These buckets are secured to the pipesin themanner shown in Fig. 4, 6 representing the bucket, which is cast in two parts and clamped to the pipe with bolts, as indicated at 28 and 29. These can be arranged to form a continuous longi tudinal bucket throughout the length of the cylinder, or they can be arranged in sections overlapping each other, or in any desired position to best hold and convey the material to the best advantage.

To fully understand the manner in which the coil is secured to the cylinder, reference will be had to Fig. 5. 5 represents the pipe 5 1, the cylinder. To the interior of the cylinder are secured angle-bars, as shown at 25, and corresponding angle-bars are secured to the pipes. These are held to the pipes by means of strips running along the inside of the coil, as at 2%, which are clamped to the This pipe 9 is closely' angle-bars by bolts, as at 27, so as to secure them firmly to the pipes. The two anglebars are then secured together by bolts, as indicated at 26. In this manner the coil of pipe is secured firmly to the cylinder, leaving a space between it and the'pipes, so that the material has access to the full heating-surface of the pipe.

Referring to Fig. 1, 14: represents a pipe, to which is attached at any convenient point an exhaust blower or fan, which conducts away the moist air from the interior of the drier, so that there is at all times a dry heated air, through which the material is showered, effecting the greatest possible drying efti ciency. 15 represents a chute, through which the material is supplied to the cylinder. 16

represents a striking-bar arranged to ride over projections, as indicated at 17, which causes a quick rapping on the outside of the cylinder to jar off any material that has a tendency to adhere to the interior. This is arranged on the drier at a point where the material is in a moist condition and is most liable to stick.

Having thus described the several portions of the machine which go to make up the complete working apparatus, I now proceed to explain the manner in which it operates.

Having put the cylinder in operation by applying power to the pulley 13, the material which is to be dried, and which is preferably ground up or cut and passed through a series of rolls to extract a. portion of the moisture, is fed into the cylinder through the chute 15. The material is caught upon the pipes which are charged with steam, and held in contact with the same by means of the carrying-buckets until it has reached an elevation sufficient for it to slide from the buckets and be showered through the hot air. This continuous movement, together with the inclined position of the cylinder, causes the material to gradually travel toward the open end of the cylinder where it is emptied in a perfectly dry condition.

Having thus fully described the construction and operation of my improved machine, it is clear that modifications may be made in the details of construction-such,for instance, as the use of sheet-iron angle-buckets in lieu of the cast clamp-buckets, and the same maybe attached to the cylinder instead of to the pipes. Other methods of fastening the pipe to the cylinder, other constructions of steam inlet and exhaust ends, and the use of wooden external cylinders in lieu of steel and iron, as it is sometimes advisable in the case of drying sand, salt, or material of like nature, which readily cuts away steel or iron, are obviously included in my invention.

Having thus fully set forth the nature of my invention, what I wish to claim, and secure by Letters Patent, is

The drying apparatus comprising a slightly- ICC inclined rotary cylinder, a coil of steam-pipe tion of the coil relatively to them, and antiwithin the cylinder, having spaces between friction trucks or carriages arranged to sup the coils and secured to said cylinder to 1'0- port said cylinder, substantially as set forth. 1o

tate therewith, adjustable lifting-buckets se- HENRY D. VVINTON. cured to said coil, the steam inlet and exhaust Witnesses:

attachments connected with the terminals of F. A. lVALsH,

said coil in a manner to permit of the rota- O. E. BARKER. 

